Hello,
The Wolfram|Alpha Developer Team would like to announce an extension which enables embedding Wolfram|Alpha Widgets in MediaWiki pages. Wolfram|Alpha Widgets are mini-apps built on top of Wolfram|Alpha queries.
The extension page is here: http://www.mediawiki.org/wiki/Extension:WolframAlphaWidgets
The Wolfram|Alpha Widgets site is here: http://developer.wolframalpha.com/widgets/